I had a need for an under counter drawer that didn't take up a lot of room and wanted to use the awesome drawers from the Ultimate Drawer System (UDS) by MarcElbichon. However, there wasn't a 1 up shelf. So here it is. There are two versions. One that keeps the "ribs" on the upper and lower insides of the shelf and one that eliminates the ribs. The no rib version prints faster.